1 files changed, 1 insertions, 0 deletions

diff --git a/setup.py b/setup.py
index 76fb4a55..c68278e7 100644
--- a/setup.py
+++ b/setup.py
@@ -14,6 +14,7 @@ import versioneer
 
 required = [
     'twisted>=14.0.0',
+    'cryptography',
     'zope.interface',
     'service-identity',
     'colorama',